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 * of conditions and the following disclaimer in the documentation and/or other materials
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package no.nordicsemi.android.kotlin.ble.core.mutex

import android.util.Log
import kotlinx.coroutines.sync.Mutex

/**
 * Wrapper class around [Mutex]. It is used to for debugging when [lock], [unlock] functions needs
 * to be logged.
 *
 * Mutex should be shared between all client calls to GATT client, otherwise pending calls will be
 * ignored by Android API.
 *
 * @property mutex Original Kotlin [Mutex].
 */
class MutexWrapper(private val mutex: Mutex = Mutex()) {

    private val requestMap = mutableMapOf<RequestedLockedFeature, Int>()

    suspend fun lock(feature: RequestedLockedFeature) {
        val pendingRequests = requestMap[feature] ?: 0
        requestMap[feature] = pendingRequests+1
        mutex.lock()
    }

    fun tryLock() {
        mutex.tryLock()
    }

    fun unlock(feature: RequestedLockedFeature) {
        val pendingRequests = requestMap[feature] ?: 0
        if (pendingRequests > 0) {
            requestMap[feature] = pendingRequests-1
            mutex.unlock()
        }
    }
}
